Electrical plug connection



June 26, 1934. KLlNGBERG 1,964,471

ELECTRICAL PLUG CONNECTION Filed Sept. 30. 1952 INVENTOR KoberziA.f(Z1Lr257Ze7"g,

Patented June 26, 1934 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates to improvements inelectrical plug connections, andthe object of my improvement is to supply a device of this type whichshall be inexpensive, of simple construction, very easy to manipulate,and positive in its coupling and maintenance of electrically conductingcontacts between terminals.

This object I have successfully achieved in actual reduction to practiceby the means which are hereinafter described and claimed, and which areillustrated in the accompanying drawing, in which Fig. 1 is a verticalcentral section taken longitudinally of my device when its housingmembers are coupled together as electrical plug connectors. Fig. 2 is asimilar section of the coupled device, taken in a position ninetydegrees circumferentially around as compared to said Fig. 1. Fig. 3 is aplan of the coupling face of one of said housing members which has the 2projecting pair of engaging terminals, and Fig. 4

is a plan view of the comating couplingface of the other housing memberin which is housed the other and comating pair of engaging terminals. Inthe ordinary kind of coupled electrical plug connectors the pairs ofcontacting terminals in the housing members of insulation are rigid, andby reason of continuous coupling and disengagements develop wear whichrenders them ineflicient, hence uneconomical for use.

It is my purpose to render these coupling members resilient for constanteffective coaction notwithstanding wear, and to shape their parts and tooperate againsksuitable abutments for most serviceable use. In the.drawing, Fig. 1 shows the comating apertured housing members 1 and 12,both constructed of insulating material bodily with fiattened faces forjoint contact when coupled together. The cap or housing member 1 has anin-:

tegral annular flange around its outer end for greater convenience ingrasping it by the user at 4. This member has a central longitudinalbore 2 to receive the end parts of received and insulated wrappedelectrical conductors as usual.

The central bore 2 is widened into a hollow 3 at the lower part of themember 1, by an offset shoulder diametrically across it. As shown inFigs. 1 and 3 a like pair of terminally hooked conducting bars aremounted diametrically opposite each Bil other in reverse positions oftheir outbent bases with angular parts 6 and which are at their anglessecured to said shoulder by means of screws,

7 or other suitable means. The outer extremities of the parts 6 carrybinding-screws 8 whereby the 56 bared ends of the first-mentionedconductors 5 end of the member 1.

The other insulating housing member 12 is 'closed at its lower or ratherouter end except for a small bore to receive centrally therethrough thethreaded stem of a headed contact screw 17, which however maybe a rivetinstead. The facing end of the member 12 has a pair of opposite vslotted apertures 13 at either side of a diametrical integral insulatingpart or abutment 14, and this abutment extends down a suitable distancewithin said member to a centrally cupped hollow 15 whose inner wall isin communication directly with the outer wall parts of the apertures 13.although not necessarily in direct alinement but may be slightly oflsetoutwardly therefrom. The lower part of the outer wall of the housingmem- 30 her 12 is slightly reduced in diameter at a shoulder to receivethereon fixedly a threaded sleeve 18 of conducting material, the loweredge of this sleeve being spaced above the head of the conducting screw1'7.

A generally similar pair of resilient conducting contact bars aremounted within the hollow 15 to extend within the apertures 13, and havelike reversely bent and spaced terminals 20 which contact electricallywith the stems 9 when the latter are introduced into the hollow incoupled relation of the members 1 and 12.

When.in such coupled relation, the terminal hooks 10 of the contact bars9 engage the adjacent or abutting walls of the abutment 14 under bendingtension, causing the resilient outer faces of the stems 9 to contacttherealong with the hooks 20 of the-other pair of conducting bars 19.This also tensions the hooks 20 similarly, so that these'contactingfaces are surely kept in good electrical contact notwithstanding anyfrictional wear of such surfaces due to the frequent couplings ordisenzagements there- 'of. Thebent overstop ends 11 of the hooks 10 ofthe bars 9 serve to keep these hooks from narrowing their interspaces atthe rounded angles of connection thereof with their stems 9. It will beseen that the contacts are always good, while the coupling of thecontact bars is easy.

As shown in Fig. 1, the contact bars 19 have angular feet as at, 16-,extending. in the same direction but of different lengths, one -foot '16being apertured to receivethe stem of-the screw (or rivet 1'7), whilethe otherand shorter foot of the other contact bar '19 traverses-a slot2-1 in the lowerpart of the housing-member 12 and is in terminal contactwith the lower edge .of the sleeve l8,- this ssrew l'l andthreadedsleeve 18 being the same as inthe usualplug connectors to effectcontacts in a socket connectionfor ends of other electrical conductorparts 5.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is:

1. In combination, comating apertured insulating housing members, aseparated pair of resilient conductors mounted in one housing tounderresilientcompression, and the second pair of conductors, havingstems ending in inwardly inverted: terminations to engage the adjacentstem-parts. of .the first pair under compression resiliently while thestem'parts of the second pair are engaged against the outwardly disposedwalls of the said spaced openings of the said other housingmember,thesecond pair of terminals -,traver s i ng said, second member ininsulatedrelation to each -other.

In combination, hollowed insulating housing members, one having anintegral diametrical abutment,'one member having fixed therein a spacedprojecting pair of terminals whose stems terminate in hooked resilientconductor bars with their hooks engaging opposite faces of said abutmentunder elastic compression when the housing members are coupled together,and the other housing member having fixed therein a spaced inclosed pairof terminally hooked resilient conductor bars with their hooks engagingadjacent faces of the stems of the first bars under elastic compressionwhile the said members are so coupled, for equalized longitudinalcontact of both sets of bars when coupled.

ROBERT A. KLINGBERG.

